By Sruthi Shankar and Bansari Mayur Kamdar (Reuters) -UK’s top share index reversed early gains and fell on Wednesday, dragged lower by a weakness in defensive stocks, while a surge in inflation to 40-year highs cemented bets for a bigger-than-usual rate hike by the Bank of England next month. The FTSE 100 fell 0.4%, after rising as much as 0.7%, as healthcare and consumer staples stocks such as Astrazeneca, British American Tobacco and Unilever weighed on the blue-chip index. British consumer prices surged in June to hit an annual rate of 9.4%, the highest since early-1982, according to offic…